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Temporal englacial water content variability associated with a rapidly retreating glacier

Temporal englacial water content variability associated with a rapidly retreating glacier
Temporal englacial water content variability associated with a rapidly retreating glacier
This study uses a combination of evidence from ground penetrating radar, borehole, video, and wireless probe data to assess temporal changes in englacial water content associated with Briksdalsbreen, a rapidly retreating Norwegian glacier. Over a 13?day period in 2006, ice radar-wave velocity varied between 0·135?m/ns (±?0·009) and 0·159?m/ns (±?0·003), and water content from 7·8% (+2·6, ?2·8) to 2·5% (+0·9, ?1·1) [derived from the Looyenga (Physica31(3): 401–406, 1965) formula]. It is suggested that during warm precipitation free days, void spaces within the glacier become filled with water, resulting in low radar-wave velocity. This stored water then drained during cold, high precipitation days, allowing the radar-wave velocity to rise. These changes in englacial storage were caused by the enhanced crevassing generated by the newly floating ice margin, and were associated with accelerated glacier retreat.
0197-9337
1230-1239
Hart, Jane K.
e949a885-7b26-4544-9e15-32ba6f87e49a
Rose, Kathryn C.
cd0070d1-5373-4f2c-be61-18cc5278f4fb
Martinez, Kirk
5f711898-20fc-410e-a007-837d8c57cb18
Hart, Jane K.
e949a885-7b26-4544-9e15-32ba6f87e49a
Rose, Kathryn C.
cd0070d1-5373-4f2c-be61-18cc5278f4fb
Martinez, Kirk
5f711898-20fc-410e-a007-837d8c57cb18

Hart, Jane K., Rose, Kathryn C. and Martinez, Kirk (2011) Temporal englacial water content variability associated with a rapidly retreating glacier Earth Surface Processes and Landforms, 36, (9), pp. 1230-1239.

Record type: Article

Abstract

This study uses a combination of evidence from ground penetrating radar, borehole, video, and wireless probe data to assess temporal changes in englacial water content associated with Briksdalsbreen, a rapidly retreating Norwegian glacier. Over a 13?day period in 2006, ice radar-wave velocity varied between 0·135?m/ns (±?0·009) and 0·159?m/ns (±?0·003), and water content from 7·8% (+2·6, ?2·8) to 2·5% (+0·9, ?1·1) [derived from the Looyenga (Physica31(3): 401–406, 1965) formula]. It is suggested that during warm precipitation free days, void spaces within the glacier become filled with water, resulting in low radar-wave velocity. This stored water then drained during cold, high precipitation days, allowing the radar-wave velocity to rise. These changes in englacial storage were caused by the enhanced crevassing generated by the newly floating ice margin, and were associated with accelerated glacier retreat.

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More information

Published date: July 2011
Organisations: Earth Surface Dynamics

Identifiers

Local EPrints ID: 176765
URI: http://eprints.soton.ac.uk/id/eprint/176765
ISSN: 0197-9337
PURE UUID: 262e4b97-6fc5-47e3-9ab2-fab4c5184801
ORCID for Jane K. Hart: ORCID iD orcid.org/0000-0002-2348-3944
ORCID for Kirk Martinez: ORCID iD orcid.org/0000-0003-3859-5700

Catalogue record

Date deposited: 04 Oct 2011 13:23
Last modified: 10 Nov 2017 19:49

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Contributors

Author: Jane K. Hart ORCID iD
Author: Kathryn C. Rose
Author: Kirk Martinez ORCID iD

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